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Selectivity improvement of interdigital filtering-antenna using different orders for 5 G application

Published online by Cambridge University Press:  10 November 2022

Dwi Astuti Cahyasiwi Open the ORCID record for Dwi Astuti Cahyasiwi [Opens in a new window] ,
Emilia Roza ,
Mohammad Mujirudin ,
Nusriyati Mahmuda Nashuha ,
Fitri Yuli Zulkifli  and
Eko Tjipto Rahardjo
Dwi Astuti Cahyasiwi*
Affiliation:
Department of Electrical Engineering, Universitas Muhammadiyah Prof. DR. HAMKA, Jl. Tanah Merdeka, Jakarta Timur, Indonesia
Emilia Roza
Affiliation:
Department of Electrical Engineering, Universitas Muhammadiyah Prof. DR. HAMKA, Jl. Tanah Merdeka, Jakarta Timur, Indonesia
Mohammad Mujirudin
Affiliation:
Department of Electrical Engineering, Universitas Muhammadiyah Prof. DR. HAMKA, Jl. Tanah Merdeka, Jakarta Timur, Indonesia
Nusriyati Mahmuda Nashuha
Affiliation:
Department of Electrical Engineering, Universitas Muhammadiyah Prof. DR. HAMKA, Jl. Tanah Merdeka, Jakarta Timur, Indonesia
Fitri Yuli Zulkifli
Affiliation:
Department of Electrical Engineering, Universitas Indonesia, Depok, Indonesia
Eko Tjipto Rahardjo
Affiliation:
Department of Electrical Engineering, Universitas Indonesia, Depok, Indonesia
*
Author for correspondence: Dwi Astuti Cahyasiwi, E-mail: dwi.cahyasiwi@uhamka.ac.id
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Abstract

In this paper, filter and antenna integration is studied to produce a compact device for wireless front-end equipment. Filtering antennas are advanced due to their selectivity performance, represented by a flat gain response. Two filtering antennas are proposed to improve the selectivity using different orders. The first antenna is based on second-order filter and the other on third-order filter. Both antennas are designed to operate at 4.65 GHz for mid-band 5 G application with a bandwidth of 6.45%. The first antenna integrates a rectangular radiator and an interdigital resonator based on second-order filter. It obtained a bandwidth impedance of −10 dB for 300 MHz and a maximum gain of 6.48 dBi. Meanwhile, the second design consists of a rectangular radiator and two interdigital resonators based on third-order filter as the feedline. Having the same bandwidth as the first design, the second design achieved a flat gain of 6.37 dBi in the operational bandwidth. The second antenna design showed better selectivity with sharper gain than the first design. The two antennas were fabricated and measured for validation. The simulation and measurement results showed good agreement.

Keywords

5Gfiltering antennainterdigital resonatorselectivity
Type
Antenna Design, Modeling and Measurements
Information
International Journal of Microwave and Wireless Technologies , Volume 15 , Issue 7 , September 2023 , pp. 1179 - 1187
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Copyright
© The Author(s), 2022. Published by Cambridge University Press in association with the European Microwave Association

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